cabling and connections
vacon • 37
24-hour support: +358 (0)201 212 575 • Email: vacon@vacon.com
6
6.2 Control unit
The control unit of the inverter consists of the control board and option boards (see Figure 6-7 and
Figure 6-20) connected to the five slot connectors (A to E) on the control board. The control board is
connected to the power unit through a D connector (1).
Figure
6-7.
control
board
Figure
6-8.
Basic
and
option
board
connections
on
the
control
board
When the inverter is delivered from the factory, the control unit usually includes two basic boards
(I/O board and relay board), which are normally installed in slots A and B. On the next pages you will
find the arrangement of the control I/O and the relay terminals of the two basic boards, the general
wiring diagram and the control signal descriptions. The I/O boards mounted at the factory are
indicated in the type code. For more information on the option boards, see Vacon NX option board
manual (ud741).
The control board can be powered externally (+24V) by connecting the external power source to
bidirectional terminal #6 (see Table 6-9). This voltage is sufficient for parameter setting and for
keeping the fieldbus active.
Note! If the +24V input of several inverters are connected in parallel, we recommend to use a diode
in terminal #6 to avoid the current to flow in opposite direction, which might damage the control
board.
+
-
#6
#7
+
-
#6
#7
+
-
#6
#7
+
-
#6
#7
nk6_17
External
+24V
A
B
C
D
E
Summary of Contents for FI4
Page 1: ...vacon nxi inverters fi4 fi8 user manual ...
Page 2: ......
